df[1]
 
#         B
# ---------
# -0.425327
# -0.241526
# 0.039161
#  0.912686
# -1.839950
#  0.573736
#  0.051883
#  1.919987
# -0.632182
#  0.374212
# 
# [100 rows x 1 column]